Although the book reveals some surprising information about the sharp-eyed Secret- Service employees, most people already know that such people are far more _______ than the average citizen.A. potentB. robustC. wearyD. vulnerableE. vigilantF. mindful

Re: Although the book reveals some surprising information about [#permalink]
03 Oct 2017, 11:34

Expert's post

Explanation

Given the clue most people already know, you know that the way the Secret Service employees are described in the first part of the sentence—in this case sharp-eyed—is the same as the way they are described in the second part. Thus, vigilant and mindful are appropriate for the blank.

Robust and potent are a synonym pair which means strong, which is not supported by the clue, although they may indeed be strong people. They may also be vulnerable in some ways, but this choice would be the opposite of the intended meaning. The same applies for weary, which means tired.

Hence options E and F are correct!_________________

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